Description
A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.
*Note: This attack requires local system access and only affects Windows. Other operating systems are not affected.* This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 112 | 112 |
| Mozilla | Firefox ESR | unspecified – < 102.10 | 102.10 |
| Mozilla | Thunderbird | unspecified – < 102.10 | 102.10 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mozjs78 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES 15 SP4 | MozillaThunderbird | 102.10.1-150200.8.113.2 | SUSE-SU-2023:2064-1 |
| SLES 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES 15 SP2 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES 15 SP1 | MozillaFirefox | 102.10.0-150000.150.82.1 | SUSE-SU-2023:1817-1 |
| SLES 12 SP5 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLES 12 SP2 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 102.10.0-150000.150.82.1 | SUSE-SU-2023:1817-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SLE Real Time 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 102.10.0-150000.150.82.1 | SUSE-SU-2023:1817-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 102.10.0-112.156.1 | SUSE-SU-2023:1819-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 112.0.1-1.1 | openSUSE-SU-2024:12882-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.10.0-1.1 | openSUSE-SU-2024:12852-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 102.10.0-150200.152.84.1 | SUSE-SU-2023:1855-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 102.10.1-150200.8.113.2 | SUSE-SU-2023:2064-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.10.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.10.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 102.10.0-r0 | — |
Advisories 9
- WID-SEC-2023-2031 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- openSUSE-SU-2024:12852-1 MozillaThunderbird-102.10.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12882-1 MozillaFirefox-112.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2064-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1817-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1855-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1819-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-0941 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023